Abstract
Three star-shaped compounds containing bicarbazolyl side arms and various core moieties are described. Bicarbazolyl moiety proves to be a stronger donor than single carbazolyl group, providing lower ionization potential and superior thermal and electrochemical stability. The influence of the central core, that is, 2,4,6-triphenyl-1,3,5-triazine, 1,3,5-triphenylbenzene, and 9-phenylcarbazole fragments, on the properties of the compounds is investigated and supported by DFT calculations. The dependence of photophysical properties on the rigidity and polarity of the media is discussed. Owing to the differences in molecular architecture, tuning of singlet and triplet energy values can be achieved. The synthesized compounds showed good hole-transporting properties with the mobility values exceeding 10–3 cm2 V–1 s–1.
Published Version
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